Twister frame stop motion



Patented Mar. 17, 1936 UNITED STATES PATENT OFFICE TWISTER, FRAME STOP MOTION Application May 22, 1934, Serial N0. 726,910

6 Claims.

This invention relates to a stop motion for a spinning or twister frame, particularly such as used for worsted; and has for one of its objects an improved method for providing such a de- 5 vice whereby the construction and assembly of the device is simplified.

Another object of the invention is the provision of a stop motion device, the parts of which will not become loose in its use as has heretofore occurred in devices of the old construction.

Another object of the invention is to control the balance of the thread eye wire.

A further object of the invention is the pro- 15 vision of ra thread guide eye which is plated with a metal to provide a'smooth surface, and one which will better resist the wear of the thread.

A still further object of the invention is the securing of the diiferent parts together by a S welding operation, whereby the parts are rigidly retained in assembled position without coming loose at any time in their usage.

With these and other objects in view, the invention consists of certain novel features of con- 25 struction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is an end view of a pair of rolls showing the relation of my stop motion as mounted in position thereon;

Fig. 2 is a perspective view of the body portion of the stop motion;

Fig. 3 is a perspective view of the blade for 'entering between the rolls;

Fig. 4 is a perspective view of the thread eye wire;

Fig. 5 is a perspective view of these diierent parts in assembled relation;

Fig. 6 is a perspective view of a slightly modied form of the device showing a rearwardlyextending flag weighted at its end for counterbalancing the weight of the blade and the thread eye wire.

In the formation of stop motion devices for twister or spinning frames, such as are used for worsted yarns, it has been usual to provide eX- tensions on the stock of the part and roll these about each other and about the thread eye wire, to secure the parts in assembled relation. Such a securing means usually becomes loose and requires the use of considerable stock for these rolling operations, and in order that the assembly may be simplified and more positive so that the parts will not become loose, I have spot welded the parts together whereby the surplus stock which was used for the rolling of the parts about one another may be eliminated and the parts cane not come loose in their usage, and in order to provide a wear resistant coating for the portion of the wire through which the thread travels, I have chromium plated this end of the wire which provides a smooth, hard surface, and one which resists to a marked degree the wear of the thread thereon; and the following is a more detailed description of the present embodiment of this invention, illustrating the preferred means by which these advantageous results may be accomplished:

With reference to the drawing, III designates somewhat diagrammatically, the driving roll of a twister or spinning frame which extends substantially the length of the machine. Upon this roll I0 at spaced intervals, rest the upper rolls I I which are short rolls mounted in slotted bearings permitting them to rest upon the yarn I2 with suicient pressure due to their weight, to cause the yarn to be fed or drawn in its travel through the frame, the direction of travel being indicated by the arrow I3 in Figure 1.

There will be provided a plurality of separate ro-lls II along the length of the machine, and when it is desired tostop the feeding of the yarn I2, it is merely necessary to raise the rolls II in its bearings which engage the particular end to be stopped; and in order to automatically accomplish this result should the yarn break, I have provided a stop motion which consists of an L-shaped sheet metal body member I4 having an opening I5 in one of the arms lthereof, which is pivotally mounted on the axis I1 of the upper roll II. Along the other L-shaped arm I8, I position a blade I9 which has been deflected as at 2|] to provide a bulge or enlargement for limiting the movement of the stop motion, this bulge or enlargement occurs along the width of the surface I8 and between its ends with the material at either side of the bulge or enlargement contacting with the surface I8. I then assemble an eye wire 2| having a thread guide portion 22 at one end, and an L-shaped arm 23 at the other end, as illustrated in Figure 4, in contact with the blade I9 with the blade between the arm portion 23 and the arm I8 of the body and then spot weld, as at 24, 25, the assembled parts so as to secure these three parts in rigid relation. This provides a very simple manner of assembly and makes it unnecessary to provide tongues on the L-shaped arm I8 or on the blade I9 as has heretofore been done.

In order to provide a better surface with which the thread may contact in passing through the guide eye 22, I chromium plate the guide eye wire along its end portion 26 which I have found provides a very hard coating, and one which is very smooth and durable; and also very economical to manufacture.

The operation of the stop motion can best be explained in connection with Figure 1. The body is pivoted about the axis I'I of the roll I I and is so overbalanced by reason of the forwardly extending thread eye wire 2| that it tends to fall downwardly so that the edge 21 of the blade I9 will enter between the rolls I and I I, thereby causing the roll II to be lifted from the roll III and a sufficient spacing provided to move the roll out of contact with the yarn I2. The yarn itself, by traveling between the rolls and downwardly through the guide eye 22 supports and holds the stop motion with the blade in the position illustrated in Figure l, so that the weight of the roll II rests upon the arm I2 and causes it to feed between the rolls I0 and II. Should this yarn break, this support for the stop motion device is removed and the stop motion will swing about the pivot I'I into the position just explained, with the blade extending between the rolls to lift the upper roll I I from feeding relation with the yarn I2. The bulging portion on the blade I9 forms a stop to engage the lower roll and limit the insertion of the blade between the rolls Ill and II.

In the modification which I have shown in Figure 6, the arm I6 of the body is extended rearwardly as at 30, to provide a ag so that the operator can more easily pick out the end which is down, should a break in the yarn occur, it being understood as before explained that there is a long line of rolls or stop motions along the length of the machine, and when one of the ends is down, this rearwardly extending portion will stick up out of line with the others which may be readily detected; and I have found that in many cases it is desirable to counterbalance or weight the iiag or rearwardly extending end 30 to balance the weight of the blade and thread eye wire, and I have attached a weight 3| which is in the formation of a disc to the rearwardly extending arm 30, preferably by spot welding as at 32. Such weights will vary in mass according to the particular use to which it is desired that the same be put.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reservev the privilege of resorting to all the mechanical changes to Awhich the device is susceptible, the invention being dened and limited only by the terms of the appended claims.

I claim:

1. The process of forming a stop motion device which consists in assembling a pivotally mounted body member, a blade for insertion between the rolls, and a thread eye wire in contiguous relation and securing them in such assembled relation by welding.

2. Th'e process of forming a stop motion device for a twister or the like, which consists in deecting a sheet metal blade for insertion between the rolls at a point intermediate its ends to provide a stop and then assembling said blade between a body member and a thread eye wire and then securing the parts by welding the upper portion of the blade and thread eye wire to the body.

3. The process of forming a stop motion device for a twister or the like, which consists in deflecting a sheet metal blade for insertion'between the rolls at a point intermediate its ends to provide a stop, and then assembling said blade between a body member and a thread eye wire by spot welding.

4. 'Ihe process of forming a stop motion device, which consists in providing an L-shaped body member of sheet stock, a sheet stock blade with a portion to overlap with a single thickness,

one of the arms of the body member, and a thread eye wire of an L-shape at one end, assembling said parts with the blade between the L-shaped arms of the thread eye and one of the L-shaped arms of the body, and securing the parts in such assembled relation by welding.

5. The process of forming a stop motion device for a twister or the like, which consists in providing a body member with an opening for pivotally mounting it on a roll axis mounting a blade and thread eye on the body forwardly of said pivot point, and securing a weight to the body rearwardly of said pivot point to partially counterbalance the weight of said blade and thread eye wire.

6. The process of forming a stop motion device for a twister or the like, which consists in providing a body member with an opening for pivotally mounting it on a roll axis mounting a blade and thread eye on the body forwardly of said pivot point and welding a disc weight to the body rearwardly of said pivot point to partially counterbalance and control the weight of said blade and thread eye wire.

ROBERT V. OLSON. 

